Torch.



A. J. ARCHA'MBAULT.

TORCH.

APPLlcATloN man luLY 215.1917

1,260,741, Patented Mams, 191s.

2 SHEETS-SHEET 1.V

(jf WOMMMWM A. J. ARCHAMBAULT.

TORCH.

APPLICATION FILED JULY 26.1911.

1,260,741. Patented Mar. 26,1918

2 SHEETS-SHEET 2.

instaan er Application 'filed July' S36,

To all whom z' may concern.'

Be it known that l, ARTHUR J. neonati-- Bamm, a citizen of the UnitedStates, residing at lChicago, county of Cook, State of Illinois, haveinvented a certain new and useful Improvement in Torches, and declarethe following to be a full, clear, and exact description of the same,such as will enable others skilled in the art to which it pertains tomake and use the same, reference being had to the accompanying drawings,which form a part of this specification.

My invention has for its object to produce a blow torch of simple andrigid construction, adapted to operate efficiently when us.

ing as afuel kerosene or other hydrocarbons heavier than gasolene.

Viewed in its more specific aspects, my invention may be said to haveior its objects to produce a blow torch having in a small space a largeheating surface adapted to vaporize the fuel before it is dischargedfrom the burner orifice; to produce a vaporizing structure which will beeiiiciently dis posed in the flame of the torch; to produce a vaporizingdevice which will serve as a shield Ito prevent the discharge beyond thetorch of liquid fuel in case the torch should negligently be placed inacondition permitting a stream of liquid fuel to be discharged throughthe burner orifice; to produce a torch in which the mixing chamberv anda vaporizer ot large capacity are formed of a single casting; to producea torch in which the burner and the supply `pipe leading to the burnerwill be rigidly supported from and braced by Atheinain casting so as tomake it practically impossible to damage the torch through rough usage;and to produce a controlling valve in which the needle member mayreadily be replaced.

The various features oi' novelty whereby my invention is characterizedwill hereinafter be pointed out with particularity in the claims; but,for a full understanding of my invention and of'its objects andadvantages, reference may be had to the following {letal/ed descriptiontaken in connection with the accompanying drawings, wherein:

Figure l is a side elevation of a torch Specification of Letters Patent.

Patented lllar. 25p?,

lili?. .Serial No. 182,8261

arranged in accordance with a preferred form of my invention;

2 is a vertical section through a fuel inlet cap of the torch reservoir;

Fig'. 3 if a section taken approximately on line 3-3 of Fig. l, on asomewhat larger scale;

Fig. a is a section taken on line oi" Fig. 3;

Fig. 5- is a section taken on line 5-5 of Eig. 3; and

Fig. is a longitudinal section on a greatly enlarged scale through theend olf' the burner valve, illustrating the manner of attaching thecleaning needle.

Referring to the drawings, l represents a, reservoir provided with ahandle, 2,and an air pump, 3, all ot any usual or suitable construction.From the top of the reservoir approximately rises a pipe, el, from theupper end of which is supported the torch. The torch comprises acombined fuel vaporizer and a device for mixing air with the burning;`fuel, together with a burner, all of which are novel and improvedconstruction. The vaporizer and 'niiXer, which I shall call the nozzle,comprises a single casting, 5, in the form of a hollow trust-urn ot' acone, arranged with its axis horizontal as is usual in blowtorches. 0,11the under side of the member 5, near the rear or larger end of thelatter, is a downwardly projecting boss, 6, which is screwed upon orotherwise attached to the pipe 4.

The part 6 is provided with a central pas,

sage, 7, which communicates at its upper end with the rear end of onearm, 8, oi a V-shaped passage or conduit 'formed in the wallconstituting,r the under side of the meinbcr 5; the passage 8 extending`forwardly to a point near theyfront end of the member 5 and therecommunicating with the front end of the connecting passage 9 which eK-tends rearwardly and, to some degree, upwardly to the rear end of theniember. In the chamber formed in the member 5 is a lf-shaped part, 10,the apex lying a short distance behind the iront end of the me1nber 5and at about the anis thereof and the two arms extending rearwardly; oneof the arms being directed downwardly' and the approximately other oneupwardly as the rear end of the member 5 is approached. The arm which isdirected downwardly terminates at the inner end of the passage 9 and isprovided with a passage, 11, which communicates at end of the passage11, and communicat.4

ing at its rear end with a burner-supplying pipe, 13, screwed into therear end of the member 5. It will be seen that the four passages, 8, 9,11 and 12, constitute a double V or an lVl with the two apexes displacedso that one lies approximately above the other instead of at the side tereof, so that the fuel which entersthroug the port or passage 7 has along way to travel before it reaches the burner-'supplying pipe 13.

It is possible to make the member 5 with its tortuous passages intheform of a single casting by making the two V-shaped members solid andthen boring the passages into the same from the rear; the rear ends ofthe passages 8, 9 and 4l1 being closed by screw plugs, 14 and 15; bothofthe passages 9 and 11 terminating in the opening closed by the plug15. Upon removing the plugs, ready access may behad to the interior ofthe passages for the purpose of cleaning them.

At the rear end of the pipe 13 is supported the fuel injector 16, whichis disposed in axial alinement with the member 5; the member 16 beingcarried upon the end of an arm, 17, 'projecting laterally from the plpel13. At the extreme front end of the member 16 is the burner orifice,18, through which a needle, 19, on the front end of a shut-off valve,20, is adapted to project. The shut-ofi' valve is provided with ahandle, 21, at the rear end of the :member 16, and the parts are soarranged that by turning the handle the flow of fuel tio the orifice maybe permitted or interrupted? by the valve 20 and the orifice be keptcleztn by the movement of the needle back and yforth through the same.The whole worL'ing part lof the needle is smaller than the orifice sothat the orifice will not be enlarged through the -action of the needle.The orifice 18 is quite small. The cleaning needle, which is preferablyabout one-thousandth of an inch smaller in diameter than the orifice toprevent it from sticking, must therefore be quite fine and necessarilyhas to be replaced from time to time. In order to facilitate suchreplacement, without making it necessary to replace also the shut-oft'valve, I

.screw the needle into the end of the shutoffy valve as indicated at 22in Fig. 6. When a new nedele is required the old one is sim- LQBORM.

ply unscrewed anda new one put in its place. The orifice, 18, ispreferably formed in a little detachable plug, 18, so that a new orificemay be provided quickly and easily and without discarding anyconsiderable part of the burner.

The parts 13, 16 and 17 are necessarily comparatively light and in theordinary torch are often broken or bent accidentally. To avoid accidentsof this kind, I have provided the member 16 with two laterally disposedears, 23, through which extend long screws, 24, whose frontends arescrewed into the rear end of the nozzle while the rear ends arerigidlylocked to the ears by means of lock nuts, 25, placed between which andthe heads of the screws the ears are clamped. The fuel injector 16 isthus-supported by three posts consisting of the member 13 and themembers 25, distributed 4around the same and thus forming a rigid,

powerful structure. Further sti ening of the parts and protection forthe burner is afforded by means of a shield, Q6, in the form of a deepcup through the bottom of which the member 16 passes, while the mouth isextended forward into engagement with the rear end of the member 5.

The shield 26 is provided with perforations, 27, for admitting air andthe nozzle is provided with perforations, 28, in the body portionthereof and alsoin the back wall, 29, in Vthe center of which is a largeair and fuel opening, 30. The bottom of the chamber in the nozzle isinclined downwardly from thev front toward the rear and, in the rearbetween the bosses into which the plugs 14 and 15 are screwed,namely atythe low point of the chamber in the nozthat it will not becomeoverheated. Furthermore, particularly when combined with, the perforatedshield, 26, the nozzle does away with the roaring sound that is made bythe flame in all torches with which I am familiar and prevents the torchfrom being blown out in windy weather.

In the usual torch the chamber inthe nozzle decreasesI uniformly incross sectional area to the outlet end. I have found that if thisconstruction is employed in my ,irnproved torch it will produce a wideame and, in order to reduce the spread of flame, l have abruptly reducedthe outlet end of the chamber in the nozzle. This is convenientlyaccomplished by providing the outlet end recoger of the nozzle with anannular' inwardly directed iiange, 33. i l

Another feature of my invention has to do with the elosin of the fuelinlet into the reservoir. ln tie ordinary torch the cap 34 is providedWith a leather Washer which soon ceases to function properly. Instead yof a-leather Washer I employ a Washer of lead, as indicated at 35 inFig. 2.

The torch is primed and operated in the usual manner which requires noexplanation. It will be seen that as the fuel rises into the torchdevice it travels through a long passage the Walls of which are highlyheated, this being particularly true of the two elements of the passagein the V-shaped member l0 which the fuel enters last; the member 10being wholly enveloped by the llame from the burner and serving as asuper-heater to ,carry the vaporization far beyond the point to `whichit is brought in the passages 8 and' 9 which of themselves produce a.vaporization of the fuel to as high a degree the ultimate vaporizationobtained in any prior torch of which I am aware. Consequently myimproved structure carries the 'vaporization to a much higher v"degreethan has heretofore been possible, making the torch not only more,

efficient, but giving a much Wider range of control over the llame whichmay be made to projectonly an inch or two beyond the torch or be forcedoutwardly nine inches or more. Where, in the ordinary torch, the burneroi'ilice has a diameter of from six to eight one-thousandths of an inch,my improved vaporizer aifords such an increased capacity` that I am ableto use a burner 'orifico having a diameter of fourteen onethousandths ofan inch. Another advantage that results from the use of the V- shapedvapor-icing conduit Within the nozzle chamber is that the torchis notaffected to any considerable degree by Weather changes for, even if theouter Walls of the nozzle become fairly cool in cold Weather, the longlconduit which `is completely enveloped by the llame has sufficientVaporizing capacity to maintain a normal iame.

lt will also be seen that if for any reason liquid fuel is allowed tosquirt out of the burner orifice, it will strike into the crotch ot' themember 10 so us to be caught in the mixing, chamber and flow down intothe priming cup instead of shooting out of the front of the torch andthus causing possible damage to surrounding objects.

-l claim:

, l. In a plumbers torch, a burner, va mixing chamber lying infront ofthe burner, one of the Walls of said chamber having a tortuous fuelpassage through -the same, and a conduit extending across the interiorofthe chamber, said conduit being connected at one end to. said passageand at its other end to said burner. l

In a plumbers torch, a burner, a mix ing chamber lying in front of theburner,

one of the Walls of the chamber havinga fuel passage extending thereinfrom a point near the rear end of the chai'nber toward the front ofthechamber and Aback again to the rear end of the chamber,l a conduitextending across the interior of the chamloer and connected at one endto one end of said passage, and a connection between the other end ofsaid conduit and said burner.

S. ln a plumbers torch, a fuel injector, a mixing chamber lying in frontof the fuel injector, one of the walls of the chamber having a fuelpassage extending therein from a point near the rear end of the chambertoward the front of the chamber and back again to the rear end of thechamber, and a hollow V-shaped conduit arranged within said chamber withthe apex lying at approximately the axis of and in the front end of saidchamber and its arms extending rearwardly,the interior of one end ofsaid V-shaped member being connected at one end to said passage and atits other end to said fuel injector.

4. ln a plumbers torch, a casting in the form of a hollow frustum of acone having two converging passages extending longitudinally from thelarge end toward the small end and joining each other in proximity tothe latter end, and having a V- shaped conduit with its apex lying atapproximately the axis of said cone and the arms extending to the rearend of the latter, the rear end of the passage in one of said armsjoining one of the first mentioned passages in the Wall of the castingso as to form a. long continuous fuel conduit made up of the fourpassages.

5. In a plumbers torch, a casting in the form of a hollow frustum of acone having two converging passages extending longitudinally from thelarge end toward the small end and joining each other in proximity tothe latter end, and having a V# shaped conduit with its apex lying atapproximately the axis of said member and the arms extending to the rearend of the latter,

the rear end of the passage in one of said` arms joining one of thefirst mentioned passages in the wall of the casting so" as to form along continuous fuel conduit Ina-de up of the four passages. a fuelinjector connected to one end of said fuel conduit, for supplying fuelto the other end of said conduit.

6. ln a. pluinl'rers torch, a co bined I`va porizing and air mixingmember, va fuel injector lying in rear if said member, a plurality ofposts lyingl in rear of said member around said frei4 injector andconnect- 'd means ing it and saidg-member together, one of said postscontaining a fuel supply passage.

7. In a torch, a nozzle in the form of a hollow rustum of a cone, aburner situ- 5 ated behind the large end of the nozzle, and

a fuel supply conduit including a part eX tending across the interior ofthechamber in the nozzle, the nozzle having a narrow ARTHUR J.ARCHAMBAULT.

